Metaverse has been a hot topic in companies and institutions since its appearance. Should libraries participate metaverse construction？How to perform function in metaverse? Evolution process of libraries and metaverse is driven by almost same IT group. On one hand, resources and services of libraries are fundamental components of metaverse, and on the other hand, Metaverse brings new development opportunities to library. In metaverse, libraries can be interchange channels between metaverse and real world, and act as transportation terminals between different metaverses, and also promote metaverse healthy development by evaluation services, ultimately provide native resources and services in metaverse. Libraries can play an important role in all phases of metaverse development such as initial phase, basically completed phase and perfect phase.